Now, If there is a Null value in the CheckIn field, I want to get the record with the Null Value, I have done this. It works great, but I don't know what "??" means. I know that DateTime.MaxValue will sort the value with
the Null value first. But I don't understant the "??".

Answers

If a post answers your question, please click "Mark As Answer" on that post and "Mark as Helpful".

NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined objects
and unknown namespaces.

All replies

If a post answers your question, please click "Mark As Answer" on that post and "Mark as Helpful".

NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined objects
and unknown namespaces.

Since we haven't heard from you for a long time, I temporarily close this case. I mark useful reply as answer. If you have any concerns, please free feel to reopen it or submit a new question. Thanks for your understanding.